Rock crusher



K. F. EILERS Dec. 26, 1967 ROCK CRUSHER 4 Sheets-Sheet 1 Filed Aug. 9, 1965 INVENTOR KARL FRITZ EILERS fl/M ATTYS- K. F. EILERS 3,360,206

ROCK CRUSHER 4 Sheets-Sheet 2 Dec. 26, 1967 Filed Aug. 9, 1965 1) INVENTORN KARL FRITZ EILERS BY W06 VOW HTTYS.

Dec. 26, 1967 ElLERs 3,360,206

ROCK CRUSHER Filed Aug. 9, 1965 4 Sheets-Sheet 5 INVENTOR. KARL FRITZ EILERS B Wild/WWW ATTYS.

K. F. EILERS Dec. 26, 1967 ROCK CRUSHER Filed Aug. 9, 1965 4 Sheets-Sheet 4 INVENTOR KARL FRITZ EILERS BY [44% y/ fi 1 ATTYS.

United States Patent 3,360,206 ROCK CRUSHER Karl Fritz Eilers, Rte. 2, Box 63, Hayden Lake, Idaho 83835 Filed Aug. 9, 1965, Ser. No. 478,052 6 Claims. (Cl. 241-265) ABSTRACT OF THE DISCLOSURE A conventional rock crusher, having a frame supporting a pair of crushing jaws in such manner that the jaws converge downwardly to form a restricted bottom outlet and the upper portions of the jaws are relatively movable toward and away from each other, is fitted with check plates that are interposed between the jaws at the ends thereof. These cheek plates are spaced from the crushing faces of both jaws an amount less than the distance across the bottom outlet, thus allowing fines and muck that are small enough to pass through the outlet, to also escape around the edges of the cheek plates laterally along the jaw surfaces.

The cheek plates are supported independently of the jaws and the jaws can move toward and away from the converging edges of the cheek plates but not enough to open a gap larger than the bottom outlet between jaws.

My invention relates to crushers for rock and the like. In the crushers with which my invention relates it is customary to provide opposed crushing jaws that move toward and away from each other in such a manner as to maintain an outlet opening of substantially constant width through which material may discharge. The jaws in closing, crush and reduce the size of larger pieces until they will move toward the outlet, and, when reduced sufficiently in size, pass through the outlet. In such devices the ends of the crushing chamber have been closed by cheek plates.

The movable jaws have their end edges fitting closely to the cheek plates and movable across the faces thereof. In

jaw face cannot exceed the width of the discharge outlet.

It is also a purpose of my invention to provide a combination of crusher jaws and cheek plates to produce a tapering chamber in which crushing is accomplished by relative movement of the jaws toincrease and decrease the spacing therebetween while maintaining the jaw spacing at the narrow end'of the chamber substantially constant, in which the cheek plates lie between and are free to move laterally in the same direction as the jaw movement.

The nature and advantages of my invention will appear more fully from the following description and the accompanying drawings illustrating a preferred form of the invention. The drawings and description are intended to be illustrative only and various modifications from the exact details shown and described may be made within the scope of the appended claims.

In the drawings:

FIGURE 1 is a plan view of a crusher embodying my invention in which both crushing jaws move;

FIGURE 2 is a sectional view on a reduced scale taken substantially on the line 2-2 of FIGURE 1;

FIGURE 3 is a sectional view on a reduced scale taken substantially on the line 33 of FIGURE 1;

3,360,206 Patented Dec. 26, 1967 er jaw moves;

FIGURE 5 is a sectional view on a reduced scale taken substantially on the line 5-5 of FIGURE 4;

FIGURE 6 is a sectional view on a reduced scale taken substantially on the line 6-6 of FIGURE 4;

FIGURE 7 is a fragmentary sectional view taken on the line 77 of FIGURE 2;

FIGURE 8 is a fragmentary sectional view taken on the line 88 of FIGURE 3; and

FIGURE 9 is a fragmentary sectional view on the line 9-9 of FIGURE 6.

Referring now to the drawings the crusher is mounted on a frame 1, made of any suitable material such as cast steel. The frame 1 carries two shafts 2 in bearings 4 that are secured on the frame 1 by bolts 5. The shafts 2 have eccentric portions 3 which support bearings 6 that are bolted on the upper portions of the two crusher jaw plates 8 by bolts 7. The plates 8 have wear plates 9 on their inner faces.

The lower edges of the wear plates 9 are spaced apart the desired distance indicated at D to form a discharge outlet which can be varied to provide the desired fineness of crushing before the material can fall through the outlet D. The spacing is controlled by toggle plates 10 (FIG- URE 2) that are seated in ribs 11 on the backs of the jaw plates 8. The lower edges of the toggle plates 10 are supported on adjustable supports 12 which are mounted in holders 13 on the frame 1. The supports 12 are adjusted toward and away from the frame 1 by wedges 14 that are carried on bolts 15 from lugs 16 on the frame 1. Nuts 17 on the threaded upper portions of the bolts 15 are used to raise the wedges 14. The jaw plates 8 are held out against the toggle plates 10 by spring units 18.

The structure just described must have some means to prevent the material being crushed from falling out at the ends of the wear plates 9. My invention provides cheek plates 19 for this purpose. Each cheek plate has a wear plate 20 fixed to its inner face and lying between the adjacent wear plates 9 of the crusher jaws 8. The cheek plates have external ribs 21 thereon which are seated in portions 22 of the frame 1. The check plates are adjusted vertically on the portions 22 by adjusting bolts 23 that are carried by lugs 24 on the frame 1. The bolts 23 are threaded into the ribs 21 and are rotatable in the lugs 24. The portions 22 are slotted to receive bolts 25 that thread into the ribs 21 and clamp the cheek plates 19 to the frame portions 22. With this arrangement the cheek plates 19 can be set at the right height to allow the crusher jaws to close against them and to maintain the maximum spacing between the edge of a wear plate 20 and a crusher jaw wear plate 9 such that pieces of aggregate larger than the width across the outlet D cannot pass between the crusher jaw wear plate 9 and the edge of the wear plate 20. This imposes the limitation that the jaw movement provided by the eccentric portion 3 of a shaft 2 cannot exceed the distance across the outlet D.

With this combination of movable crusher jaws and stationary cheek plates between them the openings between the cheek plate edges and the adjacent crusher jaw surfaces provide additional space for fines to pass through the crusher, thus allowing the jaws to act with greater efficiency on the coarse material that must be removed. If a piece is forced between the edge of the cheek plate and the crusher jaw when the crusher is fully open it is crushed against the edge on the closing movement of the jaw. This combination of parts eliminates the pockets in which muck may stick.

In the form of the invention shown in FIGURES 4 to 6 inclusive, one of the crusher jaws is stationary and the other jaw moves toward and away from it. The frame 26 has an inclined bar 27 on which a stationary jaw 28 is secured by bolts 29. A wear plate 30 is bolted to the jaw 28. A shaft 31 is journalled in the bearings 32 on the frame 26. The shaft 31 has an eccentric portion 33 on which a movable jaw 34 is journalled by a bearing 35. The mova'ble jaw 34 has a wear plate 36 bolted thereto. The lower edge of the movable jaw 34 is supported at the desired distance from the lower edge of the stationary jaw 28 by the same mechanism used in supporting the lower portions of the movable jaws of the form of the invention shown in FIGURES 1-3, 7 and 8. This mechanism includes a rib 37 on the jaw 34, a toggle plate 38, an adjustable support 39 and a spring 40.

Check plates 41 are located between the stationary jaw 28 and the movable jaw 34. These plates include wear plates 42 bolted to the plates 41 so they can be replaced when worn out. The cheek plates 41 are movable edgewise to allow the crushed and fine aggregate to move out past them. The plates are bolted to arms 43 which pivot on stub shafts 44 that are mounted in the frame 26. Each cheek plate 41 has an arm mounting rib 45 formed on its outer face and the arm 43 fits in a groove 46 in the rib 45 and is slotted to receive a clamping bolt 47 that threads into the cheek plate 41. The upper end of the arm 43 has a threaded bolt 48 secured therein and extending up through the top portion of the rib 45. Two nuts 49 are threaded on the bolt 48 for raising and lowering the cheek plate 41 on the arm 43.

In this construction the cheek plates 43 can move from contact with the wear plate 36 of the movable jaw 34 to contact with the wear plate 30 of the stationary jaw 28. Springs 50 may be used to urge the cheek plates toward center position with respect to the jaws. The sum of the distance between the edges of a wear plate 42 and the adjacent wear plates 30 and 36 must not exceed the distance across the outlet D at the lower edges of the wear plates 30 and 36.

Any suitable drive means (not shown) for the shafts 2 and 31 may be employed. I have shown the shafts as having the usual flywheels 51 thereon that are used to aid the power source in overcoming the alternate heavy load and low load on the shaft due to the fact that the movable jaws require large forces in the closing or crushing movement and very little force for retraction.

It is believed that the nature and advantage of my invention will be clear from the foregoing description. Plugging of the crusher with wet and sticky material is much more difficult than it is in the conventional crusher having only a reduced bottom outlet. Also excess fines have ample opportunity to escape. Any piecesthat lodge between the edges of the cheek wear plates and the jaw wear plates will be crushed on the closing of the jaws.

Having described my invention, I claim:

1. A crusher comprising:

a frame;

a pair of crushing jaws mounted thereon and converging downwardly to form a restricted bottom outlet; means to cause relative movement of the jaws toward and away from each other to crush large pieces of material therebetween to a size that can pass through said outlet;

cheek plates interposed between said jaws at the ends thereof;

each cheek plate being supported on the frame independently of the jaws whereby relative movement between a jaw face and cheek plate edge can take place;

said cheek plates having edges between the jaws and normally spaced from the jaws an amount less than the distance across the outlet.

2. The invention defined in claim 1 wherein the cheek plates are stationary and both jaws move toward and away from the cheek plates.

3. The invention defined in claim 1 wherein one jaw is stationary and the other jaw and the cheek plates are movably mounted on said frame to move toward and away from the stationary jaw.

4. A crusher comprising:

a rectangular frame;

a pair of parallel, spaced apart shafts extending across and rotatably supported on said frame, each shaft having an eccentric portion;

a crushing jaw journalled on each eccentric portion whereby rotation of the shaft will impart an oscillatory movement to the crushing jaw;

stop means on the frame engaging the jaws near their lower edges and limiting the movement of said lower edges away from each other;

the stop means being closer together than the eccentric portions of the shafts whereby the jaws converge downwardly;

cheek plates between said jaws at the ends thereof and above the outlet;

the cheek plates having their side edges converging downwardly; and

the converging edges of the cheek plates being spaced apart a distance less than the minimum distance between said jaws at the same level.

5. The invention defined in claim 4 wherein the cheek plates are stationary; and

means on the frame supporting said cheek plates;

said supporting means being adjustable to raise and lower the cheek plates.

6. The invention defined in claim 1 wherein the cheek plates are mounted on the frame by adjustable means operable to raise and lower the cheek plates.

References Cited UNITED STATES PATENTS 873,080 12/1907 Philips 241268 XR 1,395,959 11/1921 Herman 241-21 8 2,065,612 12/1936 Rasmussen 241268 2,352,970 7/1944 Pollitz 241218 2,341,105 2/1944 Hueneman 24l300 XR 2,449,746 9/ 1948 Kinkel 241300 XR WILLIAM W. DYER, JR., Primary Examiner.

R. J. ZLOTNIK, Assistant Examiner. 

1. A CRUSHER COMPRISING: A FRAME; A PAIR OF CRUSHING JAWS MOUNTED THEREON AND CONVERGING DOWNWARDLY TO FORM A RESTRICTED BOTTOM OUTLET; MEANS TO CAUSE RELATIVE MOVEMENT OF THE JAWS TOWARD AND AWAY FROM EACH OTHER TO CRUSH LARGE PIECES OF MATERIAL THEREBETWEEN TO A SIZE THAT CAN PASS THROUGH SAID OUTLET; CHEEK PLATES INTERPOSED BETWEEN SAID JAWS AT THE ENDS THEREOF; 